13F-HR 1 d13fhr.txt FORM 13F UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F Cover Page Report for the Calendar Year or Quarter Ended: March 31, 2005 Seneca Capital Advisors LLC -------------------------------------------------------------------------------- Name of Institutional Investment Manager 950 Third Avenue, 29th Floor New York New York 10022 -------------------------------------------------------------------------------- Business Address (Street) (City) (State) (Zip) 13F File Number: 28-03497 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information herein is true, correct and complete, and that it is understood that all required items, statements, schedules, and tables, are considered integral parts of this form. Name, Title and Telephone Number of Person Submitting Report: Gregg Grimmelbein CFO (212) 888-2999 -------------------------------------------------------------------------------- (Name) (Title) (Phone) Signature, Place and Date of Signing: /s/ Gregg Grimmelbein Gregg Grimmelbein 950 Third Avenue, 29th Floor New York, New York 10022 5/16/2005 Report Type: [X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARY PAGE Number of Other Included Managers: 1 List of Other Included Managers: Seneca Capital Investments, LLC Form 13F Information Table Entry Total: 202 Form 13F Information Table Value Total: 1,503,993,000 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 FORM 13F INFORMATION TABLE SENECA CAPITAL ADVISORS LLC FORM 13F INFORMATION TABLE AS OF DATE 3/31/05

Calpine Corp COM 131347106 1,245 444,700 CALL SOLE 444,700 Calpine Corp COM 131347106 2,940 1,050,100 CALL SOLE 1 1,050,100 Canadian Nat Res Ltd COM 136385101 3,500 61,600 SOLE 61,600 Canadian Nat Res Ltd COM 136385101 7,557 133,000 SOLE 1 133,000 Charter Communications Inc D CL A 16117M107 1,023 639,400 SOLE 639,400 Charter Communications Inc D CL A 16117M107 2,177 1,360,600 SOLE 1 1,360,600 Cheniere Energy Inc COM 16411R208 22,482 348,500 SOLE 348,500 Cheniere Energy Inc COM 16411R208 59,362 920,200 SOLE 1 920,200 Cheniere Energy Inc COM 16411R208 6,316 97,900 CALL SOLE 97,900 Cheniere Energy Inc COM 16411R208 12,057 186,900 CALL SOLE 1 186,900 Cleveland Cliffs Inc COM 185896107 13,649 187,300 SOLE 187,300 Cleveland Cliffs Inc COM 185896107 11,375 156,100 SOLE 1 156,100 Cleveland Cliffs Inc COM 185896107 598 8,200 CALL SOLE 8,200 Cleveland Cliffs Inc COM 185896107 1,137 15,600 CALL SOLE 1 15,600 Companhia Vale do Rio Doce SPONSORED ADR 204412100 6,874 258,700 SOLE 258,700 Companhia Vale do Rio Doce SPONSORED ADR 204412100 13,104 493,200 SOLE 1 493,200 Companhia Vale do Rio Doce SPONSORED ADR 204412209 1,081 34,200 CALL SOLE 34,200 Companhia Vale do Rio Doce SPONSORED ADR 204412209 1,906 60,300 CALL SOLE 1 60,300 Comstock Res Inc COM NEW 205768203 11,999 417,500 SOLE 417,500 Comstock Res Inc COM NEW 205768203 23,570 820,100 SOLE 1 820,100 Comstock Res Inc COM NEW 205768203 1,175 40,900 CALL SOLE 40,900 Comstock Res Inc COM NEW 205768203 2,233 77,700 CALL SOLE 1 77,700 Crompton Corp COM 227116100 1,809 123,900 SOLE 123,900 Crompton Corp COM 227116100 3,447 236,100 SOLE 1 236,100 Danielson Hldg Corp COM 236274106 5,189 300,800 SOLE 300,800 Danielson Hldg Corp COM 236274106 11,083 642,500 SOLE 1 642,500 Deutsche Telekom AG SPONSORED ADR 251566105 8,625 432,120 SOLE 432,120 Duke Energy Corp COM 264399106 4,574 163,300 PUT SOLE 163,301 Duke Energy Corp COM 264399106 8,720 311,300 PUT SOLE 1 311,300 Dura Automotive Systems Corp CL A 265903104 120 24,800 SOLE 24,800 Dura Automotive Systems Corp CL A 265903104 224 46,500 SOLE 1 46,500 Dynegy Inc New CL A 26816Q101 3,454 883,500 SOLE 883,500 Dynegy Inc New CL A 26816Q101 6,503 1,663,100 SOLE 1 1,663,100 El Paso Elec Co COM NEW 283677854 12,757 671,400 SOLE 671,400 El Paso Elec Co COM NEW 283677854 27,115 1,427,100 SOLE 1 1,427,100 Espeed Inc CL A 296643109 5,260 571,700 SOLE 571,700 Espeed Inc CL A 296643109 9,714 1,055,900 SOLE 1 1,055,900 Freescale Semiconductor Inc CL A 35687M107 12,716 750,200 SOLE 750,200 Freescale Semiconductor Inc CL A 35687M107 23,647 1,395,100 SOLE 1 1,395,100 Freescale Semiconductor Inc CL A 35687M107 917 54,100 CALL SOLE 54,100 Freescale Semiconductor Inc CL A 35687M107 1,700 100,300 CALL SOLE 1 100,300 Freescale Semiconductor Inc CL B 35687M206 19,060 1,104,900 SOLE 1,104,900 Freescale Semiconductor Inc CL B 35687M206 20,971 1,215,700 SOLE 1 1,215,700 Gillette Co COM 375766102 19,596 388,200 CALL SOLE 388,200 Gillette Co COM 375766102 36,406 721,200 CALL SOLE 1 721,200 Glowpoint Inc COM 379887102 128 102,667 SOLE 102,667 Glowpoint Inc COM 379887102 247 197,333 SOLE 1 197,333

HSBC Hldgs PLC SPON ADR NEW 404280406 553 6,960 SOLE 6,960 Halliburton Co COM 406216101 5,813 134,400 SOLE 134,400 Halliburton Co COM 406216101 13,057 301,900 SOLE 1 301,900 Hawaiian Holdings Inc COM 419879101 1,700 260,000 SOLE 260,000 Hawaiian Holdings Inc COM 419879101 3,547 542,400 SOLE 1 542,400 Highland Hospitality Corp COM 430141101 5,126 495,300 SOLE 495,300 Highland Hospitality Corp COM 430141101 9,495 917,400 SOLE 1 917,400 Hospira Inc COM 441060100 23,173 718,100 SOLE 718,100 Hospira Inc COM 441060100 46,675 1,446,400 SOLE 1 1,446,400 Hospira Inc COM 441060100 545 16,900 CALL SOLE 16,900 Hospira Inc COM 441060100 1,013 31,400 CALL SOLE 1 31,400 Integrated Electrical Svc COM 45811E103 1,004 363,800 SOLE 363,800 Integrated Electrical Svc COM 45811E103 2,129 771,200 SOLE 1 771,200 Interoil Corp COM 460951106 1,049 30,000 SOLE 30,000 Interoil Corp COM 460951106 1,783 51,000 SOLE 1 51,000 Ipsco Inc COM 462622101 2,652 52,000 SOLE 52,000 Ipsco Inc COM 462622101 4,957 97,200 SOLE 1 97,200 Kerr McGee Corp COM 492386107 9,909 126,500 SOLE 126,500 Kerr McGee Corp COM 492386107 19,817 241,500 SOLE 1 241,500 Kerr McGee Corp COM 492386107 5,326 68,000 CALL SOLE 68,000 Kerr McGee Corp COM 492386107 9,893 126,300 CALL SOLE 1 126,300 Key Energy Svcs Inc COM 492914106 3,903 340,300 SOLE 340,300 Key Energy Svcs Inc COM 492914106 8,116 707,600 SOLE 1 707,600 Kinder Morgan Inc Kansas COM 49455P101 9,667 127,700 PUT SOLE 127,700 Kinder Morgan Inc Kansas COM 49455P101 17,668 233,400 PUT SOLE 1 233,400 Kinder Morgan Energy Partner UT LTD PARTNER 494550106 1,472 32,700 PUT SOLE 32,700 Kinder Morgan Energy Partner UT LTD PARTNER 494550106 2,799 62,200 PUT SOLE 1 62,200 Liberty Media Intl Inc COM SER A 530719103 5,603 128,098 SOLE 128,098 Liberty Media Intl Inc COM SER A 530719103 12,238 279,790 SOLE 1 279,790 Magellan Health Svcs Inc COM NEW 559079207 4,927 144,700 SOLE 144,700 Magellan Health Svcs Inc COM NEW 559079207 10,004 293,800 SOLE 1 293,800 Massey Energy Corp COM 576206106 6,074 151,700 SOLE 151,700 Massey Energy Corp COM 576206106 13,285 331,800 SOLE 1 331,800 Medtronic Inc COM 585055106 1,976 38,778 SOLE 38,778 Microislet Inc COM 59507Q106 303 252,200 SOLE 252,200 Microislet Inc COM 59507Q106 528 440,107 SOLE 1 440,107 Molex Inc CL A 608554200 2,466 104,500 SOLE 104,500 NGP Cap Res Co COM 62912R107 1,261 78,400 SOLE 78,400

NGP Cap Res Co COM 62912R107 2,759 171,600 SOLE 1 171,600 NRG Energy Inc COM NEW 629377508 13,605 398,400 SOLE 398,400 NRG Energy Inc COM NEW 629377508 25,903 758,500 SOLE 1 758,500 Nationshealth Inc COM 63860C100 290 49,600 SOLE 49,600 Nationshealth Inc COM 63860C100 506 86,600 SOLE 1 86,600 Nationshealth Inc *W EXP 8/24/200 63860C118 64 42,700 SOLE 42,700 Nationshealth Inc *W EXP 8/24/200 63860C118 123 82,300 SOLE 1 82,300 Nationshealth Inc UNIT 08/24/2007 63860C209 127 15,900 SOLE 1 15,900 Natural Resource Partners L COM UNIT LP 63900P103 4,278 80,000 SOLE 80,000 New Century Financial Corp M COM 6435EV108 12,478 266,500 SOLE 266,500 New Century Financial Corp M COM 6435EV108 8,872 189,500 SOLE 1 189,500 News Corp CL A 65248E104 10,053 594,136 SOLE 594,136 News Corp CL A 65248E104 5,732 338,784 SOLE 1 338,784 Oregon Stl Mls Inc COM 686079104 591 25,700 SOLE 25,700 Oregon Stl Mls Inc COM 686079104 1,005 43,700 SOLE 1 43,700 PG&E Corp COM 69331C108 19,151 561,600 SOLE 561,600 PG&E Corp COM 69331C108 22,462 658,700 SOLE 1 658,700 Posco SPONSORED ADR 693483109 2,468 50,000 SOLE 50,000 Posco SPONSORED ADR 693483109 5,010 101,500 SOLE 1 101,500 Parker Drilling Co COM 701081101 564 98,000 SOLE 98,000 Parker Drilling Co COM 701081101 1,074 186,800 SOLE 1 186,800 Petrohawk Energy Corp COM 716495106 3,867 369,000 SOLE 369,000 Petrohawk Energy Corp COM 716495106 8,185 781,000 SOLE 1 781,000 Pharmacopeia Drug Discvry In COM 7171EP101 1,022 202,700 SOLE 202,700 Pharmacopeia Drug Discvry In COM 7171EP101 2,005 397,900 SOLE 1 397,900 Pioneer Nat Res Co COM 723787107 2,815 65,900 SOLE 65,900 Pioneer Nat Res Co COM 723787107 5,353 125,300 SOLE 1 125,300 Precision Drilling Corp COM 74022D100 5,036 67,300 SOLE 67,300 Precision Drilling Corp COM 74022D100 9,601 128,300 SOLE 1 128,300 Progress Energy Inc COM 743263105 1,372 32,700 PUT SOLE 32,700 Progress Energy Inc COM 743263105 2,609 62,200 PUT SOLE 1 62,200 Quanta Svcs Inc COM 74762E102 2,935 367,800 SOLE 367,800 Quanta Svcs Inc COM 74762E102 6,084 762,400 SOLE 1 762,400 Questar Corp COM 748356102 2,915 49,200 SOLE 49,200 Questar Corp COM 748356102 5,516 93,100 SOLE 1 93,100 Quilmes Indl Quinsa Societe SP ADR CL B 74838Y207 992 44,003 SOLE 44,003 Quilmes Indl Quinsa Societe SP ADR CL B 74838Y207 1,880 83,377 SOLE 1 83,377 Reliant Energy Inc COM 75952B105 5,886 517,200 SOLE 517,200 Reliant Energy Inc COM 75952B105 11,848 1,041,100 SOLE 1 1,041,100 Rhodia SPONSORED ADR 762397107 51 24,000 SOLE 24,000 Rhodia SPONSORED ADR 762397107 109 51,000 SOLE 1 51,000 Seattle Genetics Inc COM 812578102 175 34,000 SOLE 34,000 Seattle Genetics Inc COM 812578102 339 66,000 SOLE 1 66,000 Southern Co COM 842587107 3,613 113,500 PUT SOLE 113,500 Southern Co COM 842587107 6,885 216,300 PUT SOLE 1 216,300

Southern Un Co New COM 844030106 9,798 390,192 SOLE 390,192 Southern Un Co New COM 844030106 19,410 773,000 SOLE 1 773,000 Streettracks Gold GOLD SHS 863307104 8,054 188,100 SOLE 188,100 Streettracks Gold GOLD SHS 863307104 15,826 369,600 SOLE 1 369,600 Syntroleum Corp COM 871630109 1,441 117,700 SOLE 117,700 Syntroleum Corp COM 871630109 2,963 242,100 SOLE 1 242,100 TLC Vision Corp COM 872549100 9,477 1,000,700 SOLE 1,000,700 TLC Vision Corp COM 872549100 18,918 1,997,700 SOLE 1 1,997,700 TXU Corp COM 873168108 10,575 132,800 PUT SOLE 132,800 TXU Corp COM 873168108 19,900 249,900 PUT SOLE 1 249,900 Temple Inland Inc COM 879868107 3,606 49,700 CALL SOLE 49,700 Temple Inland Inc COM 879868107 6,863 94,600 CALL SOLE 1 94,600 Transalta Corp COM 89346D107 3,607 237,100 SOLE 237,100 Transalta Corp COM 89346D107 7,586 498,600 SOLE 1 498,600 TV Azteca S A DE C V SPONSORED ADR 901145102 4,252 491,600 SOLE 491,600 TV Azteca S A DE C V SPONSORED ADR 901145102 8,897 1,028,500 SOLE 1 1,028,500 USEC Inc COM 90333E108 2,802 172,100 SOLE 172,100 USEC Inc COM 90333E108 5,140 315,700 SOLE 1 315,700 U S I Hldgs COM 90333H101 2,945 250,000 SOLE 250,000 USA Mobility Inc COM 90341G103 6,727 207,631 SOLE 207,631 USA Mobility Inc COM 90341G103 13,490 416,368 SOLE 1 416,368 Unitedglobalcom CL A 913247508 1,583 167,300 SOLE 167,300 Unitedglobalcom CL A 913247508 3,594 379,900 SOLE 1 379,900 Unocal Corp COM 915289102 3,085 50,000 SOLE 50,000 Unocal Corp COM 915289102 5,854 94,900 SOLE 1 94,900 Unocal Corp COM 915289102 9,099 147,500 CALL SOLE 147,500 Unocal Corp COM 915289102 17,335 281,000 CALL SOLE 1 281,000 Vaalco Energy Inc COM NEW 91851C201 1,563 408,200 SOLE 408,200 Vaalco Energy Inc COM NEW 91851C201 2,981 778,300 SOLE 1 778,300 Veritas Software Co COM 923436109 1,778 76,589 SOLE 76,589 Viewpoint Corp COM 92672P108 2,810 1,003,600 SOLE 1,003,600 Viewpoint Corp COM 92672P108 5,212 1,861,541 SOLE 1 1,861,541 Vodafone Group PLC New SPONSORED ADR 92857W100 9,522 358,500 SOLE 358,500 Walter Inds Inc COM 93317Q105 7,842 184,300 SOLE 184,300 Walter Inds Inc COM 93317Q105 15,544 365,300 SOLE 1 365,300 Walter Inds Inc COM 93317Q105 749 17,600 CALL SOLE 17,600 Walter Inds Inc COM 93317Q105 1,434 33,700 CALL SOLE 1 33,700 Washington Group Intl Inc COM NEW 938862208 7,086 157,500 SOLE 157,500 Washington Group Intl Inc COM NEW 938862208 13,344 296,600 SOLE 1 296,600 Western Gas Res Inc COM 958259103 2,939 85,300 SOLE 85,300 Western Gas Res Inc COM 958259103 5,591 162,300 SOLE 1 162,300 Williams Cos Inc Del COM 969457100 7,370 391,800 SOLE 391,800 Williams Cos Inc Del COM 969457100 17,433 926,800 SOLE 1 926,800

SENECA CAPITAL ADVISORS LLC 13F-HR